Dry cell



.BENNER AND H. F. FRENCH.

DRY CELL.

APPLICATION FILED NOV. 14, 1918.

Patented Oct. 31, 192

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Patented ct. 3T, T92.

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DRY CELL.

Application filed November Ml, 191a. Serial No. 262,-tt3.

To" all whom it may concern:

Be it known that we, RAYMOND C. BENNER and HARRY F. FRENCH, citizens of the United States, and residents, respectively of Fremont, in the county of Sandusky and State of Ohio, and Fremont, in the county of Sandusky and State of Ohio, have in- Vented a certain new and useful Tmprovement inDry Cells, of which the following is a full, clear, and exact description.

This invention relates to dry cells and more particularly to an improvement in such cells which are intended for service imposing a heavy current drain.

When the ordinary dry cell is utilized for service which requires a heavy current, gases are developed in the cell more rapidly than the chemical reactions absorb them, thus causing an increased internal pressure. The

seal is often bulged or separated from the.

zinc container or electrode by the internal pressure, so that leaks are developed in the cell around the seal. Sometimes the sol dered joints of the can are broken, but in any case the usual result of placing the ordinary dry cell on heavy drain is to produce a leaky cell which allows the electrolyte to be exuded: Aside from the poor ap pearance resulting therefrom, the leaky'cell is liable to short circuit other cells, and its service capacity is greatly decreased by the dryin out of the mix which results when the es ls are not tightly sealed.

According to the present invention a cell is obtained which is suitable especially for heavy current drains.

The characteristic features of the present construction will be set forth in connection with the following description and the accompanying drawings illustrating several embodiments of the invention, in which- Fig. I is a central cross section of a dry cell embodying the present invention.

Fi 2 is a perspective view of the spacing ca fitted at the bottom of the cartridge.

ig. 3 is a cross section of a modified construction.

The invention as specifically illustrated in the cell shown in the drawings consists of a hollow carbon electrode 1 closed at the upper end by a cork or plug 2. The central assage 3 has a plurality of holes a bore in near the upper end, the relative position of which will later be set forth in connection with the remaining elements of the cell.

the edge of the mix. The loweriend is c0vered by a similar cap 11 having spacing prongs 12 as shown in Fig. 2. The cartridge thus formed is inserted in a zinc container electrode 13 having a pulpboard disc 14 fitted in the bottom. The mix cartridge 5 is spaced from the sides of the container, leaving a space for a viscid electrolyte paste 15 of flour, zinc chloride and ammonium chloride. The paste and cartridge preferably;

big as the holes 4: and it is essential that the holes 4 have a free passage connecting with the space containing the paste 15.

This is secured by fitting small pulpboard blocks 16 on top of the cartridge of about t0 the same thickness as the diameter of the holes, to provide an air chamber or space 17. Above'thisis placed a pulpboard disc 18 and the pitch seal 19 is then applied over the disc 18 to seal the can. A groove e5 20 maybe rolled into the zinc can to hold the seal. The usual binding posts 21 and 22 are attached to the zinc can and carbon electrode respectively.

In the modification of Fig. 3 the cork is eliminated by molding the electrode 23 with a hollow space 24:, or boring out the space 24: from a formed .electrode and drilling holes 25 to connect the space with the chamber 17.

The remaining elements are the same as those already described in connection with Figs. 1 and 2, and designated by the same reference characters.

When a heavy drain is imposed on a cell of the construction shown in Figs. 1 and 3,

the aste and electrolyte which are forced up was between the cartridge 5 and container 13 will overflow into the space 17 and run down into the hollow electrode space 3.

of Fig. l, or space 24' of Fig. 3, instead of being forced out of the cell through any leaks which might be present between the seal 19 and container 13. The possibility of developing leaks is greatly decreased by the air chamber 17 and the hollow electrode lit 7 as in the 60 extend to a point approximately as 75 which provides a space for the gases developed, 'so that a considerable quantity of gas may be contained in the cell without increasing the internal pressure enough to bulge the seal. The resulting cell therefore gives a uniforml I long life without leakage.

Having descri ed our invention, what we claim .is

1. In electric batteries, a container, a mix spaced from the container, at viscid electrolyte between the mix and container, a hollow carbon electrode, a seal in the upper end of the container, and a passageway between the seal and the upper end of the mix adapted to connect the hollow space of the carbon electrode with the space containing the electrolyte.

2. In electric-batteries, a container, a mix spaceT from the container, a viscid electrolyte between the mix and container, a hollow electrode closed at the upper end projecting from the mix, a seal in the upper end of the container, and a passage between the seal and the upper end of the mix adapted to connect the hollow space of the electrode with the electrolyte space between said mix and container.

31 In electric batteries, a container electrode, a mix therein spaced from the container, an electrolyte paste between the container and mix, a central carbon electrode in said mix having a hollow upper end and an opening into said end, a seal in the upper end of the container, and means for spacing the seal from the upper end of the mix to provide a passage in the upper end of the cell connecting the electrolyte paste with the hollow electrode space.

4. In electric batteries, a container electrode, a mix cartridge spaced from the container, a viscid electrolyte between the mix and container, a hollow carbon electrode closed at the upper end fitted in the mix and projecting therefrom, said electrode having an opening above said mix connected with A the hollow space of the electrode, and a seal in the upper end of the container spaced above said mix and opening to provide a passage adapted to connect the electrolyte with the hollow electrode.

5. In electric batteries, a container electrode, a mixcartridge, means for spacing the cartridge from the container, an electrolyte paste between the container and mix, a hollow central carbon electrode in said cartridge and projecting therefrom, said electrode having a plurality of lateral openings near said projecting end, means for closing the upper end of the electrode, a seal for the open end of the container and means for spacing the seal from the lateral openings to provide a space between said seal and mix adapted to connect the hollow electrode with the space containing the electrolyte paste.

In testimony whereof, we hereunto allix our signatures.

RAYMOND C. BENNER. HARRY F. FRENCH. 

